#!/usr/bin/env bash
# Publish a Furtka release to the Forgejo releases page.
#
# Usage: ./scripts/publish-release.sh <version>
#
# Preconditions:
#   - $FORGEJO_TOKEN set (PAT with write:repository)
#   - dist/furtka-<version>.tar.gz + .sha256 + release.json already built
#
# Behaviour:
#   1. Read the [<version>] section from CHANGELOG.md for the release body.
#   2. Create a release on Forgejo (or fail if one already exists for the tag).
#   3. Upload the three assets sequentially (Forgejo's release API has been
#      observed to choke on parallel uploads).
set -euo pipefail

VERSION="${1:?usage: $0 <version>}"
: "${FORGEJO_TOKEN:?FORGEJO_TOKEN must be set}"

HOST="${FORGEJO_HOST:-forgejo.sourcegate.online}"
REPO="${FORGEJO_REPO:-daniel/furtka}"

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
DIST_DIR="$REPO_ROOT/dist"
TARBALL="$DIST_DIR/furtka-$VERSION.tar.gz"
SHA_FILE="$TARBALL.sha256"
RELEASE_JSON="$DIST_DIR/release.json"

for f in "$TARBALL" "$SHA_FILE" "$RELEASE_JSON"; do
  [ -f "$f" ] || { echo "missing: $f"; exit 1; }
done

# Extract the changelog section for this version. Matches `## [<version>]`
# up to (but not including) the next `## [` line.
BODY="$(awk -v v="$VERSION" '
  BEGIN { inside=0 }
  /^## \[/ {
    if (inside) exit
    if (index($0, "[" v "]") > 0) { inside=1; next }
  }
  inside { print }
' "$REPO_ROOT/CHANGELOG.md")"
if [ -z "$BODY" ]; then
  BODY="Release $VERSION"
fi

PRERELEASE=false
if [[ "$VERSION" == *-alpha* || "$VERSION" == *-beta* || "$VERSION" == *-rc* ]]; then
  PRERELEASE=true
fi

api() {
  curl --silent --show-error --fail-with-body \
    --header "Authorization: token $FORGEJO_TOKEN" \
    "$@"
}

base="https://$HOST/api/v1/repos/$REPO"

# 1. Create the release. Python for JSON assembly so we don't depend on jq
# on the runner — the previous `apt-get install -y jq` step in release.yml
# hung for 15+ minutes on a slow mirror and stalled the whole publish.
release_body_json="$(
  VERSION="$VERSION" BODY="$BODY" PRE="$PRERELEASE" python3 -c '
import json, os
print(json.dumps({
    "tag_name": os.environ["VERSION"],
    "name": os.environ["VERSION"],
    "body": os.environ["BODY"],
    "prerelease": os.environ["PRE"] == "true",
}))
'
)"

echo "==> Creating release $VERSION"
release_response="$(api --request POST "$base/releases" \
  --header "Content-Type: application/json" \
  --data "$release_body_json")"

release_id="$(echo "$release_response" | python3 -c 'import json, sys; print(json.load(sys.stdin).get("id", ""))')"
if [ -z "$release_id" ] || [ "$release_id" = "null" ]; then
  echo "error: couldn't parse release id from response:"
  echo "$release_response"
  exit 1
fi
echo "    release id: $release_id"

# 2. Upload assets — one at a time.
upload_asset() {
  local path="$1"
  local name
  name="$(basename "$path")"
  echo "==> Uploading $name"
  api --request POST "$base/releases/$release_id/assets?name=$name" \
    --form "attachment=@$path" > /dev/null
}

upload_asset "$TARBALL"
upload_asset "$SHA_FILE"
upload_asset "$RELEASE_JSON"

echo "Release $VERSION published: https://$HOST/$REPO/releases/tag/$VERSION"